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GDZRS-40S DC Winding Resistance Tester

GDZRS-40S DC Winding Resistance Tester

Brief Description:

GDZRS series DC winding resistance is a mandatory test item during transformer manufacturing for semi-finished/finished products, factory acceptance tests, installation, commissioning tests, and utility preventive maintenance tests.


Product Detail

Product Tags

Features

??It can select corresponding output current value according to test products, and is mainly suitable for measuring the inductive DC resistance on transformers.

? For?large transformers with a five-leg core and low-voltage windings connected in delta, the tester can be used for the test in HV & LV series excitation mode. The magnetic augment circuit of the windings can be automatically connected in the tester, to quickly and accurately test the DC resistance of the low-voltage windings.

??With three phases test function to measure the three-phase DC resistance of the star-connected windings synchronously and calculate the three-phase unbalance rate automatically, so as to greatly reduce the measurement period and improve the test efficiency. Its phase by phase test function can also be used for phase by phase test on transformers with YN and D (Y) connections.

? The winding material can be set based on the test product's winding material, with copper or aluminum selected to differentiate the reduced temperature coefficients for different materials.

??The instrument features a built-in resistance detection function for the neutral point lead wires of the transformer's Y and N windings, ensuring that three-channel test data more closely matches single-phase test values.

??The instrument features a comprehensive protection circuit and an audible discharge alarm, providing clear discharge indication and reducing mis-operation.

??The instrument features a 7-inch color touchscreen display with a clear and attractive interface and real-time test data display.

? The instrument is available with optional Chinese and English user interfaces, customizable to your needs.

??RS232 communication port allows test data to be transferred to the back end through the host computer control software.

? USB port allows test data to be transferred to a USB flash drive.

??The instrument has a built-in calendar and can store, review, and print up to 100 sets of test data.

? The instrument offers comprehensive parameter settings, including the transformer's test winding, tap position, test phase, test product temperature, and reduced temperature.

Specifications

Test current

Single-?phase:40A, 20A, 10A, 5A, 1A, 200mA, 20mA

Three -phases:20A+20A, 10A+10A, 5A+5A, 1A+1A, 200mA+200mA, 20mA+20mA

Measuring range

Single-phase:?

40A: 0.25mΩ~0.5Ω

20A: 0.5mΩ~1Ω;

10A: 1mΩ~2Ω;

5A: 2mΩ~4Ω;

1A: 10mΩ~20Ω;

200mA: 100mΩ~100Ω;

20mA: 10Ω~20KΩ;

?

Three-phase:

20A+20A: 0.5mΩ~0.3Ω

10A+10A: 1mΩ~0.6Ω;

5A+5A: 2mΩ~1.2Ω;

1A+1A: 10mΩ~6Ω;

200mA+200mA: 100mΩ~60Ω;

20mA+20mA: 10Ω~200Ω

Measuring accuracy

±(0.2%+2 digits)

Max. resolution

0.1μΩ

Data storage

100?groups

Power supply

AC 220V±22V,50Hz/60Hz±1?Hz

Working

conditions

Environmental temperature:-10-40℃;

Relative humidity: ≤80%

Size

428mm*350mm*230mm

Weight

12.8kg

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